The Shimano BT-DN110-A Built-In Type Di2 Battery is ...
the power source for Shimano's 11 speed Di2 derailleurs and shifters. Its thin, sleek profile allows the battery to fit in seatposts or frames for a clean look.
The Shimano BMR1 and BRM2 Di2 External Battery ...
Mount Base is designed to provide an attachment point for Di2 external batteries. This mount will attach to the frame around the waterbottle bosses, and is slim enough to fit underneath a ...
cover kit for external frame mounting of Di2 wire systems. If you don't have a frame with internal wiring setup for Di2, then you go with plan-B, external wiring. Of course protecting ...